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Re: [Xen-devel] [PATCH 2/3] xen/pv-on-hvm kexec: rebind virqs to existin
| To: | Ian Campbell <Ian.Campbell@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH 2/3] xen/pv-on-hvm kexec: rebind virqs to existing eventchannel ports |
| From: | Olaf Hering <olaf@xxxxxxxxx> |
| Date: | Tue, 9 Aug 2011 11:29:38 +0200 |
| Cc: | Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Konrad <konrad.wilk@xxxxxxxxxx> |
| Delivery-date: | Tue, 09 Aug 2011 02:31:04 -0700 |
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On Tue, Aug 09, Ian Campbell wrote: > On Thu, 2011-08-04 at 17:20 +0100, Olaf Hering wrote: > > During a kexec boot some virqs such as timer and debugirq were already > > registered by the old kernel. The hypervisor will return -EEXISTS from > > the new EVTCHNOP_bind_virq request and the BUG in bind_virq_to_irq() > > triggers. Catch the -EEXISTS error and loop through all possible ports to > > find > > what port belongs to the virq/cpu combo. > > Would it be better to proactively just query the status of all event > channels early on, like you do in find_virq, and setup the irq info > structures as appropriate? Rather than waiting for an -EEXISTS I mean. Doing one hypercall in the common case is cheaper than doing a dozen in the kexec case. If you prefer I will rearrange this part and query first. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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